[PATCH 3/8] mm: implement page cache limit feature

2014-06-16 Thread Xishi Qiu 
Add hooks when a page is added to page cache.

Signed-off-by: Xishi Qiu 
---
 mm/filemap.c |3 +++
 mm/hugetlb.c |3 +++
 mm/vmscan.c  |3 +++
 3 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 088358c..0e71a04 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -622,6 +622,9 @@ int add_to_page_cache_lru(struct page *page, struct 
address_space *mapping,
void *shadow = NULL;
int ret;
 
+   if (vm_cache_limit_mbytes && page_cache_over_limit())
+   shrink_page_cache(gfp_mask);
+
__set_page_locked(page);
ret = __add_to_page_cache_locked(page, mapping, offset,
 gfp_mask, );
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index c82290b..4dc8173 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2851,6 +2851,9 @@ retry:
int err;
struct inode *inode = mapping->host;
 
+   if (vm_cache_limit_mbytes && page_cache_over_limit())
+   shrink_page_cache(GFP_KERNEL);
+
err = add_to_page_cache(page, mapping, idx, GFP_KERNEL);
if (err) {
put_page(page);
diff --git a/mm/vmscan.c b/mm/vmscan.c
index ad01ff4..707d3e3 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2977,6 +2977,9 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int 
order,
};
count_vm_event(PAGEOUTRUN);
 
+   if (vm_cache_limit_mbytes && page_cache_over_limit())
+   shrink_page_cache(GFP_KERNEL);
+
do {
unsigned long lru_pages = 0;
unsigned long nr_attempted = 0;
-- 
1.6.0.2


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[PATCH 3/8] mm: implement page cache limit feature

2014-06-16 Thread Xishi Qiu 
Add hooks when a page is added to page cache.

Signed-off-by: Xishi Qiu qiuxi...@huawei.com
---
 mm/filemap.c |3 +++
 mm/hugetlb.c |3 +++
 mm/vmscan.c  |3 +++
 3 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 088358c..0e71a04 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -622,6 +622,9 @@ int add_to_page_cache_lru(struct page *page, struct 
address_space *mapping,
void *shadow = NULL;
int ret;
 
+   if (vm_cache_limit_mbytes  page_cache_over_limit())
+   shrink_page_cache(gfp_mask);
+
__set_page_locked(page);
ret = __add_to_page_cache_locked(page, mapping, offset,
 gfp_mask, shadow);
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index c82290b..4dc8173 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2851,6 +2851,9 @@ retry:
int err;
struct inode *inode = mapping-host;
 
+   if (vm_cache_limit_mbytes  page_cache_over_limit())
+   shrink_page_cache(GFP_KERNEL);
+
err = add_to_page_cache(page, mapping, idx, GFP_KERNEL);
if (err) {
put_page(page);
diff --git a/mm/vmscan.c b/mm/vmscan.c
index ad01ff4..707d3e3 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2977,6 +2977,9 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int 
order,
};
count_vm_event(PAGEOUTRUN);
 
+   if (vm_cache_limit_mbytes  page_cache_over_limit())
+   shrink_page_cache(GFP_KERNEL);
+
do {
unsigned long lru_pages = 0;
unsigned long nr_attempted = 0;
-- 
1.6.0.2


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